Coomassie Blue R-250
(Synonyms: 酸性蓝83,Brilliant Blue R) 目录号 : GC43309
A dye for staining proteins
Cas No.:6104-59-2
Sample solution is provided at 25 µL, 10mM.
Quality Control & SDS
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- Purity: >98.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Coomassie blue R-250 is a dye that is commonly used in laboratories to stain or quantify proteins. It is a sensitive stain for protein detection in polyacrylamide gels, typically giving blue bands on a clear background with a sensitivity of 50-100 ng/band. It may be combined with other stains, such as silver stain, to distinguish different types of proteins. Coomassie blue R-250 displays metachromasia by appearing pink-red, rather than blue, when binding certain proteins, such as collagen and histone H1.
| Cas No. | 6104-59-2 | SDF | |
| 别名 | 酸性蓝83,Brilliant Blue R | ||
| Canonical SMILES | CC/[N+](CC1=CC(S([O-])(=O)=O)=CC=C1)=C(C=C/2)\C=CC2=C(C3=CC=C(N(CC)CC4=CC=CC(S([O-])(=O)=O)=C4)C=C3)\C(C=C5)=CC=C5NC6=CC=C(OCC)C=C6.[Na+] | ||
| 分子式 | C45H44N3O7S2•Na | 分子量 | 826 |
| 溶解度 | DMF: 2 mg/ml,DMSO: 10 mg/ml,Ethanol: 0.1 mg/ml,PBS (pH 7.2): 1 mg/ml | 储存条件 | Store at -20°C |
| General tips | 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。 储备液的保存方式和期限：-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。 为了提高溶解度，请将管子加热至37℃，然后在超声波浴中震荡一段时间。 |
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| Shipping Condition | 评估样品解决方案：配备蓝冰进行发货。所有其他可用尺寸：配备RT，或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 1.2107 mL | 6.0533 mL | 12.1065 mL |
| 5 mM | 0.2421 mL | 1.2107 mL | 2.4213 mL |
| 10 mM | 0.1211 mL | 0.6053 mL | 1.2107 mL |
| 第一步：请输入基本实验信息（考虑到实验过程中的损耗，建议多配一只动物的药量） | ||||||||||
| 给药剂量 | mg/kg |  |
动物平均体重 | g | |
每只动物给药体积 | ul | |
动物数量 | 只 |
| 第二步：请输入动物体内配方组成（配方适用于不溶于水的药物；不同批次药物配方比例不同，请联系GLPBIO为您提供正确的澄清溶液配方） | ||||||||||
| % DMSO % % Tween 80 % saline | ||||||||||
| 计算重置 | ||||||||||
计算结果:
工作液浓度： mg/ml；
DMSO母液配制方法： mg 药物溶于 μL DMSO溶液（母液浓度 mg/mL，
体内配方配制方法：取 μL DMSO母液，加入 μL PEG300，混匀澄清后加入μL Tween 80，混匀澄清后加入 μL saline，混匀澄清。
1. 首先保证母液是澄清的；
2.
一定要按照顺序依次将溶剂加入，进行下一步操作之前必须保证上一步操作得到的是澄清的溶液，可采用涡旋、超声或水浴加热等物理方法助溶。
3. 以上所有助溶剂都可在 GlpBio 网站选购。
The Roles of Acetic Acid and Methanol During Fixing and Staining Proteins in an SDS-Polyacrylamide Electrophoresis Gel
Methods Mol Biol 2018;1853:15-18.PMID:30097924DOI:10.1007/978-1-4939-8745-0_2.
After SDS-polyacrylamide gel electrophoresis proteins are "fixed" in the gel to prevent dispersion of the proteins and visualized by staining with a chromogenic dye. Dyes like Coomassie Blue R-250, Amido Black, and Direct Red 81 are usually dissolved in an acetic acid-methanol-water mixture. During staining the dye solvent mixture infuses the gel and interacts with the protein. Acetic acid and methanol denature the protein and provide an acidic environment enhancing the interactions with dyes. After staining, the dye that is in the gel and not bound to the protein, is removed using the solvent medium the dyes were dissolved in. Over 2-3 h the solution surrounding the gel becomes colored, the gel becomes lighter and the protein bands remain dark and the contrast against the surrounding gel improves. This chapter describes how each of the individual components in the dye solution interact with the protein resulting in a stained protein band in a clear SDS-polyacrylamide electrophoresis gel.
Coomassie Blue R-250 metachromatic staining of histone 5 from goose and chicken erythrocytes
Comp Biochem Physiol B 1983;75(1):133-5.PMID:6189670DOI:10.1016/0305-0491(83)90050-0.
1. Histone 5 stains metachromatically with Coomassie Blue R-250, a property shared only with collagens and procollagens, histones 1 and 2B, and possibly certain proline-rich salivary gland proteins. 2. Coomassie Blue-stained goose and chicken H5 induce the same degree of metachromasia, which is intermediate between that induced by H1 and H2b. 3. The absorption spectra of all Coomassie Blue-stained gel bands consist of a primary maximum at 555 nm, but the absorption spectra of H5 gel bands also include a prominent shoulder in the vicinity of 525 nm, a region in which H1 gel bands display a secondary maximum. 4. The possible role of proline-rich sequences in the induction of metachromasia is discussed.
Sodium dodecyl sulphate-polyacrylamide gel electrophoresis of human parotid salivary proteins: comparison of dansylation, Coomassie Blue R-250 and silver detection methods
Electrophoresis 1996 Mar;17(3):505-6.PMID:8740168DOI:10.1002/elps.1150170314.
Detection of human parotid salivary proteins by dansylation and UV-transillumination after sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) has been compared with Coomassie Blue R-250 and silver staining procedures. Dansylation gives superior results in terms of both resolution and sensitivity, especially with basic proline-rich proteins (PRPs).